Nov. 18 (UPI) -- About 6 million people are expected to fly to their Thanksgiving destinations but the key to holiday travel goes through the Federal Aviation Administration . The FAA's mandated 6% reduction in flight capacity ended Sunday as operations ramp up following the record 43-day government shutdown. However a persistent shortage of air traffic controllers has been exacerbated since the shutdown began. The air travel infrastructure of the United States has been operating with a